{
  "fix": "Mozilla Thunderbird ESR (ms) 140.3.0",
  "url": "https://patchblox.com/security/fix/windows-app/mozilla.thunderbird.esr.ms-140.3.0",
  "summary": "Mozilla Thunderbird ESR (ms) 140.3.0, released September 17, 2025, fixes 5 CVEs in Mozilla Thunderbird ESR (ms). None of them is reported as exploited. Patch Radar priority: High. The latest Mozilla Thunderbird ESR (ms) is 153.7.0, which also fixes every one of these CVEs.",
  "platform": "windows-app",
  "type": "app-version",
  "title": "Mozilla Thunderbird ESR (ms) 140.3.0",
  "released": "2025-09-17T00:00:00Z",
  "priority": "High",
  "priorityTier": 3,
  "priorityReason": "Closes CVE-2025-10533, high severity",
  "supported": true,
  "cveCount": 5,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.00781,
  "maxCvss": 8.8,
  "appliesTo": [
    {
      "product": "Mozilla Thunderbird ESR (ms)",
      "productUrl": "https://patchblox.com/security/product/windows-app/mozilla-thunderbird-esr-ms",
      "fixedVersion": "140.3.0",
      "latestVersion": "153.7.0",
      "supported": true
    }
  ],
  "supersededBy": {
    "product": "Mozilla Thunderbird ESR (ms)",
    "latestVersion": "153.7.0",
    "productUrl": "https://patchblox.com/security/product/windows-app/mozilla-thunderbird-esr-ms"
  },
  "cves": [
    {
      "cveId": "CVE-2025-10533",
      "url": "https://patchblox.com/security/cve/CVE-2025-10533",
      "title": "Integer overflow in the SVG component",
      "priority": "High",
      "severity": "Medium",
      "cvss": 8.8,
      "epss": 0.00781,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-10528",
      "url": "https://patchblox.com/security/cve/CVE-2025-10528",
      "title": "Sandbox escape due to undefined behavior, invalid pointer in the Graphics: Canvas2D component",
      "priority": "High",
      "severity": "Medium",
      "cvss": 7.5,
      "epss": 0.0037,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-10532",
      "url": "https://patchblox.com/security/cve/CVE-2025-10532",
      "title": "Incorrect boundary conditions in the JavaScript: GC component",
      "priority": "High",
      "severity": "Medium",
      "cvss": 7.5,
      "epss": 0.00328,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-10527",
      "url": "https://patchblox.com/security/cve/CVE-2025-10527",
      "title": "Sandbox escape due to use-after-free in the Graphics: Canvas2D component",
      "priority": "High",
      "severity": "Medium",
      "cvss": 7.5,
      "epss": 0.0029,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-10536",
      "url": "https://patchblox.com/security/cve/CVE-2025-10536",
      "title": "Information disclosure in the Networking: Cache component",
      "priority": "High",
      "severity": "Medium",
      "cvss": 7.5,
      "epss": 0.00175,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-11T13:47:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}